Insulator-pin.



` PATENTED AUG. 8, 1905.

P. M. LOCKB.

INSULATOR PIN.

jaa/miba" @d 7n, La

wwf/nga UNITED STATES PATENT OFFICE.

Specification of Letters Patent.

Patented Aug. 8, 1905.

Application filed September 25, 1902. Serial No.`l24,766.

To al?, whom it may concern.'

Be it known that I, FRED M. LOCKE, of Victor, in the county of Ontario,in thefState of New York, have invented new and useful 1mprovements inInsulator-Pins, of which the following, taken in connection with theaccompanying drawings, is a full, clear, and eX- act description.

This invention relates to improvements in insulator-pins for carryinghigh-potential insulators.

My object is to improve their construction, durability, and generalutility by first increasing their mechanical strength and, second, bypresenting more insulating-surface to come in contact with the insulatoritself, and thereby add to the insulating qualities of the insulator;and to that end my invention consists in the several new and novelfeatures of construction hereinafter described, and specifically setforth in the claims hereunto annexed. Itis constructed as follows,reference being had to the accompanying drawings, in whichi Figure 1shows a section of a cross-arm and a high-potential insulator mountedupon my improved pin. Fig. 2 is a View of the insulating-pin mountedupon a cross-arm. Fig. 3 is a sectional view of the pin seen in Fig. land a modified form of shaft and fasteningbolt.

a is a high-potential insulator having a downwardly-extending petticoata', as shown in Fig. l, and provided with the usual central opening orrecess.

The insulator-pin comprises a shaft preferably of wood, although itmaybe constructed of any other material, and a skirt adapted to restupon the upper end of the shaft I) and extend down sufficiently far torest upon the cross-arm c. l

The shaft b is constructed of sufficient lengthso as to sit down intothe cross-arm c or may run clear through and may be held in position bya lag-bolt c, or, as seen in Fig. 3, the bolt may extend clear throughthe shaft and be provided with a head on its upper end between the topend of the shaft and the inner face of the sleeves b', which may be madeof porcelain, glass,earthenware,or similar material. The outer face ofthe upper portion of the sleeves b' is constructed so as to fit snuglyin the inner face of the petticoat a. By constructing an insulator-pinin the form above shown and described it will be observed that themechanical strength of the pin is increased by reason of the fact thatthe lower edges of the sleeves ZJ' rest upon the upper face of thecross-arm and the insulating qualities ofthe pin are increased bypresenting more insulating-surface to corne in contact with theinsulator itself. It will also be observed that by constructing a pin ofthis sort I am enabled to prevent the static discharge sufficient toburn off the pin at the point where it joins the cross-arm. The upperend only of the sleeve 5' is fitted on the upper end of the shaft b,while its lower end is flared outwardly and is separated from the pin toform an air-space between the sleeve and base ofthe pin and also for thepurpose of affording a broad bearing for the sleeve upon the cross-arm.In like manner the petticoat a is fitted on the upper end of the sleeve,and its lower end flares outwardly and forms an air-space between it andthe sleeve. A covering of insulating material may also be placed overthe outer face of the insulationcap.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-

1. The combination with a cross-arm, of an insulator-pin forhigh-potential insulators, said pin comprising a shaft secured to andprojecting from the cross-arm, and a sleeve closed at its upper end, andresting on the shaft and having a portion at the upper end of equaldiameter and fitting snugly with the shaft and its lower end restingupon the crossarm, but separated from the base of the shaft to form anair-space between the sleeve and shaft and to afford a broad bearing onthe support around the base of the shaft.

2. In combination, a support, a shaft projecting from the support, asleeve having its upper end closed, a portion of said sleeve at theupper end being of uniform diameter and fitting snugly on the upper endof the shaft, the remainder of said sleeve tapering and resting itsloWer'end on the support and 'forming n air-Space around the base o't'the shaft, a )ettieoa et' porcelain or equivalent material resting onthe upper end of the sleeve, being free from Contact with the sides ofthe sleeve, and having an outwardly-Haring lower end, substantially asdescribed.

In Witness whereof l have hereunto set my hand this 30th day of August,1902.

FRED M. LOCKE.

Witnesses:

VM. W. BURKE,

C. J. PELL.

